Write an expression that is equivalent to (3+14)+27​

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

If value of cos330° is √3/2 then find tan165°.

What is the inverse of the function f(x) = 2x + 1?